Method and system for providing transfer service between mobile terminal and telematics terminal

ABSTRACT

The present invention relates to method and system for releasing terminal switching between a mobile terminal and a telematics terminal, and the method according to the present invention comprises receiving from the mobile terminal a terminal switching release request including an identification code representing terminal switching release; restoring information of the mobile terminal by inactivating information of the telematics terminal set as information of the mobile terminal in a home location register and activating information of the mobile terminal based on the identification code; and transmitting a mobile terminal activation command to a first switching center, where the mobile terminal is located, to allow a mobile communication service of the mobile terminal.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a continuation of pending U.S. patent applicationSer. No. 12/600,614 (filed on Nov. 17, 2009), which is a National StagePatent Application of PCT International Patent Application No.PCT/KR2008/002754 (filed on May 16, 2008) under 35 U.S.C. §371, whichclaims priority to Korean Patent Application Nos. 10-2007-0048320 (filedon May 17, 2007) and 10-2007-0056756 (filed on Jun. 11, 2007), theteachings of which are incorporated herein in their entireties byreference.

TECHNICAL FIELD

The present invention relates to communication terminal switching, andin particular, to terminal switching from a mobile terminal to atelematics terminal.

BACKGROUND ART

To transfer all profiles of an existing mobile terminal to a new mobileterminal, currently a procedure for terminal change or terminal canceland reopening is required, which is not one-time property, but aneternal property. And, subsequent to profile transfer, for restorationto an original state, the above-mentioned procedure should be repeated.

Meanwhile, recently WCDMA (Wideband CDMA) system capable of videocommunication is introduced, and in the case a mobile subscriber wantsto use from a mobile terminal in use to another mobile terminal, themobile subscriber separates a smart card (for example, USIM (UniversalSubscriber Identity Module)) mounted in the mobile terminal in use andmounts the separated smart card in the another mobile terminal, and thenthe mobile subscriber uses the another mobile terminal. The separatingand mounting of the smart card is a cumbersome work. Therefore, asolution is required to overcome the disadvantage, which allows themobile subscriber to use freely from a mobile terminal in use to anothermobile terminal.

And, recently, a telematics service provides various multimediafunctions, for example navigation that guides a driver and passengers todestination, burglar alarm, emergent rescue (SOS), remote diagnostics,expendables management, a hands-free mobile phone, living information,personal information, secretary service or Internet connection. Inparticular, a telematics terminal with the telematics service has anembedded mobile communication module, and thus the telematics terminalcan provide mobile communication, and in the case that the telematicsterminal is connected to an external mobile phone of a user, thetelematics terminal can provide mobile communication hands-free.

However, in the same way that mobile terminals are incompatible witheach other, a telematics terminal and a mobile terminal are utterlyincompatible with each other. After a mobile subscriber directlyconnects his/her mobile terminal to a telematics terminal by a cable,the mobile subscriber can use mobile communication hands-free, however aprofile of the mobile terminal is not automatically switched to thetelematics terminal. In other words, to prevent a car accident, when amobile subscriber gets in a vehicle, the mobile subscriber should use amobile phone service hands-free, however conventionally the mobilesubscriber connects a mobile terminal to a telematics terminal by acable to use a mobile phone service hands-free. This causesinconvenience, and because a telematics terminal with a mobile phonefunction is used only as a conventional hands-free mobile phone,favorable functions of the telematics terminal are not fully utilized.

DISCLOSURE Technical Problem

The present invention is designed to solve the above-mentioned problems,and therefore it is an object of the present invention to provideterminal switching service method and system, which performs terminalswitching from a mobile terminal to a telematics terminal to receive amobile communication service provided to the mobile terminal by thetelematics terminal.

And, it is another object of the present invention to provide terminalswitching service method and system, which subsequent to terminalswitching, releases terminal switching to receive a mobile communicationservice by a mobile terminal again.

Further, it is another object of the present invention to provide methodand system for providing a call information message of a non-receivedcall in a terminal switching service, which transmits a call informationmessage of a non-received call to a mobile terminal in a non-receivingstate of a terminal-switched telematics terminal.

And, these and other features, aspects, and advantages of the presentinvention will be more fully described in the preferred embodiments ofthe present invention. And, the objects and advantages of the presentinvention can be implemented by configurations recited in the claimssingularly or in combination.

Technical Solution

In order to achieve the above-mentioned objects, a method for providinga terminal switching service between a mobile terminal and a telematicsterminal according to a first aspect of the present invention, whichreleases a terminal switching state from a mobile terminal to atelematics terminal in a mobile communication system, comprisesreceiving from the mobile terminal a terminal switching release requestincluding an identification code representing terminal switchingrelease; restoring information of the mobile terminal by inactivatinginformation of the telematics terminal set as information of the mobileterminal in a home location register and activating information of themobile terminal based on the identification code; and transmitting amobile terminal activation command to a first switching center, wherethe mobile terminal is located, to allow a mobile communication serviceof the mobile terminal.

And, a system for providing a terminal switching service between amobile terminal and a telematics terminal according to a second aspectof the present invention, which releases terminal switching made from amobile terminal to a telematics terminal in a mobile communicationnetwork, the system comprises a first switching center serving as aswitching center for the mobile terminal and configured to receive fromthe mobile terminal a terminal switching release request including anidentification code representing terminal switching release; a terminalswitching service device configured to receive the terminal switchingrelease request from the first switching center based on theidentification code; a first home location register serving as a homelocation register for the mobile terminal and configured to restoreinformation of the mobile terminal by inactivating information of thetelematics terminal set as information of the mobile terminal andactivating information of the mobile terminal according to command ofthe terminal switching service device; and a second switching centerserving as a switching center for the telematics terminal and configuredto restore a profile information of the mobile terminal set as a profileinformation of the telematics terminal to a profile information of thetelematics terminal, wherein the first switching center receives amobile terminal activation command from the first home location registerto release interception of a mobile communication service of the mobileterminal.

And, a method for providing a call information message of a non-receivedcall in a terminal switching service according to a third aspect of thepresent invention, which provides a call information message of anon-received call in a terminal switching state from a mobile terminalto a telematics terminal in a mobile communication system, comprisesprocessing a call destined for the mobile terminal by the telematicsterminal; in the case that the telematics terminal is in a non-receivingstate, writing a call information message of a non-received call; andtemporarily allowing the mobile terminal to receive the written callinformation message and transmitting the written call informationmessage to the mobile terminal.

Further, a system for providing a call information message of anon-received call in a terminal switching service according to a fourthaspect of the present invention, which provides a call informationmessage of a non-received call in a terminal switching state from amobile terminal to a telematics terminal, comprises a first switchingcenter serving as a switching center for the telematics terminal andconfigured to process a call destined for the mobile terminal by thetelematics terminal; a home location register for storing a profileinformation of the mobile terminal, and in the case that the telematicsterminal is in a non-receiving state, receiving from the first switchingcenter a request for transmission of a call information message of anon-received call; a call information providing device for writing acall information message of a non-received call and transmitting thecall information message via a message center at the request of the homelocation register; and a second switching center serving as a switchingcenter for the mobile terminal and configured to receive the callinformation message, temporarily allowing the mobile terminal to receivethe call information message, and transmitting the call informationmessage to the mobile terminal.

DESCRIPTION OF DRAWINGS

FIG. 1 is a view illustrating a network configuration of a terminalswitching service system according to an embodiment of the presentinvention.

FIG. 2 is a flow chart illustrating a step for setting terminalswitching in the terminal switching service system according to anembodiment of the present invention.

FIG. 3 is a flow chart illustrating a step for releasing terminalswitching in the terminal switching service system according to anembodiment of the present invention.

FIG. 4 is a flow chart illustrating a step for releasing terminalswitching in the terminal switching service system according to anotherembodiment of the present invention.

FIG. 5 is a view illustrating an example of a table stored in a homelocation register.

FIG. 6 is a view illustrating a network configuration of a terminalswitching service system according to another embodiment of the presentinvention.

FIG. 7 is a flow chart illustrating a method for transmitting to amobile terminal a call information message of a non-received call in anon-receiving state of a telematics terminal according to an embodimentof the present invention.

BEST MODE

Hereinafter, preferred embodiments of the present invention will bedescribed in detail with reference to the accompanying drawings. Priorto the description, it should be understood that the terms used in thespecification and the appended claims should not be construed as limitedto general and dictionary meanings, but interpreted based on themeanings and concepts corresponding to technical aspects of the presentinvention on the basis of the principle that the inventor is allowed todefine terms appropriately for the best explanation. Therefore, thedescription proposed herein is just a preferable example for the purposeof illustrations only, not intended to limit the scope of the invention,so it should be understood that other equivalents and modificationscould be made thereto without departing from the spirit and scope of theinvention.

FIG. 1 is a view illustrating a network configuration of a terminalswitching service system according to an embodiment of the presentinvention.

As shown in FIG. 1, the terminal switching service system according tothe present invention comprises a mobile terminal 110 of a mobilesubscriber, a telematics terminal 120 mounted in a vehicle, a basetransceiver station 130, a switching center 140, a mobile communicationnetwork 150, a home location register 160 and a terminal switchingserver 170.

The mobile subscriber carries the mobile terminal 110 and gets in avehicle, and switches a mobile communication service from the mobileterminal 110 to the telematics terminal 120, so that the subscriberreceives the mobile communication service provided to the mobileterminal 110 by the telematics terminal 120. At this time, if the mobileterminal 110 is a terminal capable of voice or video communication andtext message sending and receiving, the mobile terminal 110 is notlimited to a specific kind of terminal. For example, the mobile terminal110 includes PDA (Personal Digital Assistant), a cellular phone, a PCS(Personal Communication Service) phone, a GSM (Global System for Mobile)phone, a W-CDMA phone, a CDMA-2000 phone or an MBMS (MultimediaBroadcast and Multicast Service) phone. And, the telematics terminal 120provides a typical telematics service, and in particular, provides amobile communication service through an embedded mobile communicationmodule. The telematics terminal 120 is assigned a separate phone numberand provides a mobile communication service in the same way as themobile terminal 110.

The mobile subscriber gets in the vehicle, connects to the terminalswitching server 170 by the telematics terminal 120, selects the mobileterminal 110 for terminal switching, and requests terminal switching. Atthis time, the terminal switching server 170 provide the telematicsterminal 120 with a list of a plurality of mobile terminals, andreceives selection of any one mobile terminal among the list from themobile subscriber. For example, a family having one vehicle subscribesfor a terminal switching service, sets the telematics terminal 120 as anobject for terminal switching, and sets information of mobile terminals110 of each member of the family. In the case that a member of thefamily gets in the vehicle and drives the vehicle, the driver connectsto the terminal switching server 170 by the telematics terminal 120,selects his/her mobile terminal among the mobile terminal list of thefamily provided from the terminal switching server 170 and requeststerminal switching.

At this time, in the case that the engine starts, the telematicsterminal 120 may be automatically connected to the terminal switchingserver 170. An electronic control unit of the vehicle senses thestarting and transmits a control signal to the telematics terminal 120according to sensing of engine starting, and the telematics terminal 120is automatically connected to the terminal switching server 170.

Alternatively, the mobile subscriber may directly input a telephonenumber of his/her mobile terminal 110 into the telematics terminal 120to request terminal switching to the terminal switching server 170.Thus, the mobile terminal 110 of the mobile subscriber who drives thevehicle is inactivated, and the telematics terminal 120 is activated, sothat the mobile subscriber can use a mobile communication service by thetelematics terminal 120, not by the mobile terminal 110.

In alternative embodiments, the telematics terminal 120 mayautomatically set a telephone number of a specific mobile terminal torequest terminal switching to the terminal switching server 170. Thiscan be applied only in the case that one mobile subscriber for thetelematics terminal 120 subscribed for a terminal switching service. Theexemplary terminal switching request method may be easily changed,altered or modified by persons skilled in that art within theabove-mentioned range.

The base transceiver station (BTS/NodeB) 130 is connected with thetelematics terminal 120 and the mobile terminal 110 wirelessly tocontrol each terminal 110 and 120 and connect a traffic channel, andreceives an outgoing call from each terminal 110 and 120 and transmitsthe outgoing call to a base station controller/radio network controller(BSC/RNC)(not shown). The base station controller/radio networkcontroller controls the base transceiver station 130, and performswireless channel assignment and release on each terminal 110 and 120,transmitter power control of each terminal 110 and 120 and the basetransceiver station 130, determination of soft handoff and hard handoffbetween cells, transcoding and vocoding, or management and maintenanceand repair of the base transceiver station 130

The switching center 140 performs basic and additional serviceprocessing, processing of incoming and outgoing calls of a subscriber,location registration and handoff, or interworking with other network,i.e. a public network or an intelligent network system. In particular,after terminal switching, the switching center 140 intercepts a calloriginated from the mobile terminal 110, and provides the telematicsterminal 120 with a voice/video call destined for the mobile terminal110. Preferably, the switching center 140 stores and manages an inactiveinformation of the mobile terminal 110 and intercepts a service of themobile terminal 110, and stores an identification information (forexample, MSISDN (Mobile Subscriber International Subscriber DirectoryNumber) of the mobile terminal 110 corresponding to IMSI (InternationalMobile Subscriber Identity) of the telematics terminal 120 and providesthe telematics terminal 120 with a mobile communication service destinedfor the mobile terminal 110 using the identification information.

Meanwhile, after terminal switching, the switching center 140 interceptsall calls originated from the mobile terminal 110, and may not interceptan outgoing call for a specific function. For example, when the mobilesubscriber uses the telematics terminal 120 after terminal switching,although the mobile subscriber wants to release the terminal switching,call origination of the mobile terminal 110 is intercepted, so it is notpossible to release terminal switching by the mobile terminal 110.Therefore, in the case that an outgoing call for terminal switchingrelease is transmitted from the mobile terminal 110, the switchingcenter 140 allows origination of the corresponding call, so thatterminal switching is released. Preferably, the switching center 140stores and manages a function code information for terminal switchingrelease, and when an outgoing call including the function code istransmitted from the mobile terminal 110, the switching center 140refers to the function code and allows origination of the correspondingoutgoing call.

The mobile communication network 150 is connected with the switchingcenter 140, the home location register 160 and the terminal switchingserver 170, and provides interface and signaling between each networkequipment. Preferably, the mobile communication network includes No. 7network, and each network equipment operates while being connected tothe No. 7 network.

The home location register (HLR) 160 is a database for storing a serviceprofile about a subscriber information of each terminal 110 and 120, andstores and manages an identification number (IMSI or MSISDN), anadditional service information and a location information of eachterminal 110 and 120, and information necessary for terminal switchingaccording to the present invention.

Preferably, the home location register 160 stores and manages a locationinformation of each terminal 110 and 120, and in the case that themobile subscriber requests to switch from the mobile terminal 110 to thetelematics terminal 120, the home location register 160 inactivatesinformation of the mobile terminal 110 and activates information of thetelematics terminal 120, so that a mobile communication service (forexample, a voice/video call) provided to the mobile terminal 110 isprovided to the telematics terminal 120.

On the contrary, in the case that the mobile subscriber requests torelease terminal switching, the home location register 160 activatesinformation of the mobile terminal 110 and inactivates information ofthe telematics terminal 120, so that a mobile communication service (forexample, a voice/video call) is provided to the mobile terminal 110 asoriginally provided.

FIG. 5 is a view illustrating an example of a table stored in the homelocation register 160, and as shown in FIG. 5, according to terminalswitching request of the mobile subscriber, the home location register160 activates/inactivates a location information of the mobile terminal110 of the mobile subscriber and inactivates/activates a locationinformation of the telematics terminal 120 (that is, sets a terminalswitching flag to ‘1’ or ‘0’). Specifically, in the case that the mobilesubscriber using the mobile terminal 110 of a telephone number└010-111-xxxx┘ requests terminal switching, the home location register160 that stores a profile information of the mobile terminal 110 of thecorresponding mobile subscriber, inactivates a location information(RN1) of the mobile terminal 110 of the corresponding mobile subscriber(sets a terminal switching flag to ‘0’) and activates a locationinformation of the telematics terminal 120 (sets a terminal switchingflag to ‘1’) by setting a location information (RN2) of the telematicsterminal 120 to a location information of the mobile terminal 110. Onthe contrary, in the case of terminal switching release, the homelocation register 160 inactivates a location information (RN2) of thetelematics terminal 120 (sets a terminal switching flag to ‘0’) andactivates a location information (RN1) of the mobile terminal 110 (setsa terminal switching flag to ‘1’).

The terminal switching server 170 stores and manages a terminalswitching service subscriber information, and according to terminalswitching request to a mobile subscriber, the terminal switching server170 provides terminal switching of the mobile terminal 110, and storesand manages information according to terminal switching. Preferably,when receiving a terminal switching request from the mobile subscriber,the terminal switching server 170 inactivates information of the mobileterminal 110 stored in the home location register 160, and activatesinformation of the telematics terminal 120 stored in the home locationregister 160. And, when receiving a terminal switching release requestfrom the mobile subscriber, the terminal switching server 170 activatesinformation of the mobile terminal 110 stored in the home locationregister 160 and inactivates information of the telematics terminal 120stored in the home location register 160.

FIG. 2 is a flow chart illustrating a step for setting terminalswitching in the terminal switching service system according to anembodiment of the present invention.

As shown in FIG. 2, first, to switch from the mobile terminal 110 to thetelematics terminal 120, a mobile subscriber requests terminal switchingto the terminal switching server 170 using the telematics terminal 120.In the case of terminal switching request using the telematics terminal120, the telematics terminal 120 transmits to the switching center 140 aterminal switching request signal including an identificationinformation (for example, MSISDN) of the mobile terminal 110 via awireless section (S201). Subsequently, the switching center 140transmits to the terminal switching server 170 the terminal switchingrequest signal including the identification information of the mobileterminal 110 (S203). At this time, preferably the switching center 140transmits the terminal switching request signal to the home locationregister 160, receives a routing information toward the terminalswitching server 170 in response to the terminal switching requestsignal, and transmits to the terminal switching server 170 the terminalswitching request signal including the identification information of themobile terminal 110.

Here, a subscriber certification step may be performed between thetelematics terminal 120 and the terminal switching server 170. That is,the terminal switching server 170 requires the telematics terminal 120to input a password, and compares the inputted password with theterminal switching service subscriber information to perform subscribercertification. In this embodiment, the mobile subscriber requeststerminal switching by inputting a telephone number of the mobileterminal 110 into the telematics terminal 120, however, in alternativeembodiments, the mobile subscriber may not input a telephone number ofthe mobile terminal 110 into the telematics terminal 120, but insteadthe terminal switching server 170 may perform subscriber certification,extract information of a plurality of mobile terminals 110 stored in thetelematics terminal 120 and provide the mobile subscriber with theextracted information to allow the mobile subscriber to select an objectmobile terminal for terminal switching.

The terminal switching server 170 receives the terminal switchingrequest signal as mentioned above, and inquires out IMSI of the mobileterminal 110 in a terminal information DB (S205). That is, the terminalswitching server 170 inquires out IMSI of the mobile terminal 110 in theterminal information DB using the telephone number (for example, MSISDN)of the mobile terminal 110.

Next, the terminal switching server 170 requests a location informationof the telematics terminal 120 (for example, the switching center (MSC1of FIG. 2) 140 information) to the home location register (HLR1 of FIG.2) 160 that stores a profile information of the telematics terminal 120,and receives a response to the request (S207 and S209).

Subsequently, the terminal switching server 170 transmits a terminalswitching command including the location information of the telematicsterminal 120 (for example, the switching center (MSC1) 140 information)to the home location register (HLR2 of FIG. 2) 160 that stores a profileinformation of the mobile terminal 110 (S211).

The home location register (HLR2) 160 that stores a profile informationof the mobile terminal 110 receives the terminal switching command fromthe terminal switching server 170, inactivates a location information ofthe mobile terminal 110 stored and managed therein, and sets andactivates the location information of the telematics terminal 120included in the terminal switching command (S213). That is, not anactual location information of the mobile terminal 110, but the locationinformation of the telematics terminal 120 is set as a locationinformation of the mobile terminal 110 in the home location register(HLR2) 160 that stores a profile information of the mobile terminal 110,and the location information of the telematics terminal 120 isactivated, so that a service signal destined for the mobile terminal 110is transmitted to the telematics terminal 120.

Next, the home location register (HLR2) 160 that stores a profileinformation of the mobile terminal 110 transmits the profile informationof the mobile terminal 110 to the switching center (MSC1) 140, where thetelematics terminal 120 is located (S215). The switching center (MSC1)140, where the telematics terminal 120 exists, receives the profileinformation of the mobile terminal 110, and changes the profileinformation of the telematics terminal 120 into the received profileinformation of the mobile terminal 110 (S217). That is, the switchingcenter (MSC1) 140 maps the telephone number (for example, MSISDN) of themobile terminal 110 to the IMSI of the telematics terminal 120, andstores and manages the mapping information. Preferably, the informationof the telematics terminal 120 is stored and managed in a visitorlocation register (VLR). And, preferably the home location register(HLR2) 160 maps the profile information of the mobile terminal 110 tothe IMSI of the telematics terminal 120, and transmits the mappinginformation to the switching center (MSC1) 140, and the switching center(MSC1) 140 replaces the profile information of the telematics terminal120 with the received information. Finally, the switching center (MSC1)140 does not map the profile information of the telematics terminal 120,but the profile information of the mobile terminal 110 to the IMSI ofthe telematics terminal 120 and stores and manages the mappinginformation.

A call destined for the mobile terminal 110 is transmitted to theswitching center (MSC1) 140, where the telematics terminal 120 exists,by the home location register (HLR2) 160 that stores a profileinformation of the mobile terminal 110. The switching center (MSC1) 140searches for IMSI of the telematics terminal 120 in the mappinginformation using a called party information (for example, MSISDN of themobile terminal 110) of the transmitted call, performs paging on thetelematics terminal 120 using the searched IMSI, and transmits to thetelematics terminal 120 an incoming call to be transmitted to the mobileterminal 110. Thus, the mobile subscriber can be provided with a servicedestined for the mobile terminal 110 using the telematics terminal 120,not using the mobile terminal 110.

Meanwhile, the home location register (HLR2) 160 that stores a profileinformation of the mobile terminal 110 transmits a mobile terminalinactivation command to the switching center (MSC2 of FIG. 2) 140, wherethe mobile terminal 110 exists (S219). According to the inactivationcommand, the switching center (MSC2) 140 intercepts a service destinedfor the mobile terminal 110 and intercepts a call originated from themobile terminal 110, so that the mobile subscriber can not use a serviceby the mobile terminal 110.

As mentioned above, according to the terminal switching method of thepresent invention, after the mobile subscriber gets in the vehicle, themobile subscriber can be provided with a service destined for the mobileterminal 110 through the telematics terminal 120, instead of the mobileterminal 110. Therefore, the present invention can prevent a caraccident that may occur during driving.

FIG. 3 is a flow chart illustrating a step for releasing terminalswitching in the terminal switching service system according to anembodiment of the present invention.

As shown in FIG. 3, first, when a mobile subscriber uses theterminal-switched telematics terminal 120 and wants to switch from thetelematics terminal 120 to the mobile terminal 110 again, the mobilesubscriber requests terminal switching release to the terminal switchingserver 170 using the telematics terminal 120. In the case of terminalswitching release request to the terminal switching server 170 using thetelematics terminal 120, the telematics terminal 120 transmits to theswitching center (MSC1 of FIG. 3) 140 a terminal switching releaserequest signal including an identification information of the telematicsterminal 120 via a wireless section (S301). At this time, in the casethat the engine of the vehicle stops, the telematics terminal 120 mayautomatically attempt terminal switching release. That is, when theengine of the vehicle stops, an electronic control unit mounted in thevehicle recognizes that the engine of the vehicle stops and transmits acontrol signal to the telematics terminal 120 according to recognition.The telematics terminal 120 may automatically request terminal switchingrelease to the terminal switching server 170.

Subsequently, the switching center 140 transmits to the terminalswitching server 170 the terminal switching release request signalreceived from the telematics terminal 120 (S303). At this time,preferably the switching center 140 transmits the terminal switchingrelease request signal to the home location register 160, receives arouting information toward the terminal switching server 170 in responseto the terminal switching release request signal, and transmits theterminal switching release request signal to the terminal switchingserver 170.

Next, the terminal switching server 170 transmits the terminal switchingrelease request signal to the home location register (HLR1 of FIG. 3)160 that stores a profile information of the telematics terminal 120(S305). Then, the home location register (HLR1) 160 that stores aprofile information of the telematics terminal 120 transmits the profileinformation of the telematics terminal 120 to the switching center(MSC1) 140, where the telematics terminal 120 is located (S307).

The switching center (MSC1) 140, where the telematics terminal 120 islocated, receives the profile information of the telematics terminal120, and restores a profile information of the telematics terminal 120stored therein using the received profile information of the telematicsterminal 120 (S309). That is, the switching center (MSC1) 140 mapped atelephone number (for example, MSISDN) of the mobile terminal 110 toIMSI of the telematics terminal 120 in the profile information of thetelematics terminal 120, and stored and managed the mapping information.However, according to terminal switching release of the mobilesubscriber, the switching center (MSC1) 140 restores the telephonenumber of the mobile terminal 110 mapped to the IMSI of the telematicsterminal 120 to a telephone number of the telematics terminal 120.

Meanwhile, the terminal switching server 170 transmits the terminalswitching release request signal to the home location register (HLR2 ofFIG. 3) 160 that stores a profile information of the mobile terminal 110(S311). That is, the terminal switching server 170 extracts informationof the mobile terminal 110 using a terminal switching service subscriberinformation and information of the telematics terminal 120 stored andmanaged therein, and transmits the terminal switching release requestsignal to the home location register (HLR2) 160 that stores a profileinformation of the mobile terminal 110, based on the extractedinformation.

The home location register (HLR2) 160 that stores a profile informationof the mobile terminal 110 receives the terminal switching releaserequest signal from the terminal switching server 170, activates alocation information of the mobile terminal 110 stored and managedtherein, and inactivates a location information of the telematicsterminal 120 (S313). That is, not an actual location information of themobile terminal 110, but the location information of the telematicsterminal 120 was set as a location information of the mobile terminal110 in the home location register (HLR2) 160 that stores a profileinformation of the mobile terminal 110, but the location information ofthe mobile terminal 110 is restored to an actual location information ofthe mobile terminal 110. Thus, a service signal destined for the mobileterminal 110 can be transmitted to the mobile terminal 110 normally.

Meanwhile, the home location register (HLR2) 160 that stores a profileinformation of the mobile terminal 110 transmits a mobile terminalactivation command to the switching center (MSC2 of FIG. 3) 140, wherethe mobile terminal 110 is located (S315). Thus, the switching center(MSC2) 140 transmits to the mobile terminal 110 a service destined forthe mobile terminal 110, and allows a call originated from the mobileterminal 110 to provide an original service.

FIG. 4 is a flow chart illustrating a step for releasing terminalswitching in a terminal switching service system according to anotherembodiment of the present invention, and unlike an embodiment of FIG. 3,terminal switching is released using a service-intercepted mobileterminal 110

As shown in FIG. 4, first, to restore the terminal-switched telematicsterminal 120 to the mobile terminal 110 and use the mobile terminal 110again, a mobile subscriber inputs a function code (for example, **44)for terminal switching release into the mobile terminal 110 and pressesa “begin call” button. Then, a terminal switching release requestincluding the function code is transmitted from the mobile terminal 110to the switching center (MSC2 of FIG. 4) 140 (S401). After terminalswitching is made, the switching center (MSC2) 140 intercepts a calloriginated from the mobile terminal 110, but in the case that a featurecode for terminal switching release is included in an outgoing call,allows origination of the outgoing call.

Then, the switching center (MSC2) 140 requests terminal switchingrelease to the terminal switching server 170 based on the function code(S403). At this time, preferably the switching center (MSC2) 140requests interpretation of the feature code to the home locationregister 160, receives a routing information toward the terminalswitching server 170 in response to the request, and transmits aterminal switching release request signal to the terminal switchingserver 170.

Next, the terminal switching server 170 receives the terminal switchingrelease request signal and transmits the terminal switching releaserequest signal to the home location register (HLR1 of FIG. 4) 160 thatstores a profile information of the telematics terminal 120, using aterminal switching service subscriber information stored therein (S405).Then, the home location register (HLR1) 160 that stores a profileinformation of the telematics terminal 120 transmits the profileinformation of the telematics terminal 120 to the switching center (MSC1of FIG. 4) 140, where the telematics terminal 120 is located (S407).

The switching center (MSC1) 140, where the telematics terminal 120 islocated, receives the profile information of the telematics terminal120, and restores information of the telematics terminal 120 storedtherein using the received profile information of the telematicsterminal 120 (S409). That is, the switching center (MSC1) 140, where thetelematics terminal 120 is located, mapped a telephone number (forexample, MSISDN) of the mobile terminal to IMSI of the telematicsterminal 120 in the profile information of the telematics terminal 120,and stored and managed the mapping information. However, according toterminal switching release of the mobile subscriber, the switchingcenter (MSC1) 140 restores the identification information of the mobileterminal 110 mapped to the IMSI of the telematics terminal 120 to atelephone number of the telematics terminal 120.

Meanwhile, the terminal switching server 170 transmits the terminalswitching release request signal to the home location register (HLR2 ofFIG. 4) 160 that stores a profile information of the mobile terminal 110(S411).

The home location register (HLR2) 160 that stores a profile informationof the mobile terminal 110 receives the terminal switching releaserequest signal from the terminal switching server 170 as mentionedabove, activates a location information of the mobile terminal 110stored and managed therein and inactivates a location information of thetelematics terminal 120 (S413). That is, not an actual locationinformation of the mobile terminal 110, but the location information ofthe telematics terminal 120 was set as a location information of themobile terminal 110 in the home location register (HLR2) 160 that storesa profile information of the mobile terminal 110, but the locationinformation of the mobile terminal 110 is restored to an actual locationinformation of the mobile terminal 110. Thus, a service signal destinedfor the mobile terminal 110 can be transmitted to the mobile terminal110 normally.

Meanwhile, the home location register (HLR2) 160 that stores a profileinformation of the mobile terminal 110 transmits a mobile terminalactivation command to the switching center (MSC2) 140, where the mobileterminal 110 is located (S415). Thus, the switching center (MSC2) 140transmits to the mobile terminal 110 a service destined for the mobileterminal 110, and allows a call originated from the mobile terminal 110to provide an original service.

In the case that the mobile subscriber using the terminal-switchedtelematics terminal 120 gets off the vehicle or the vehicle moves awayfrom a mobile communication service area, terminal switching can not bereleased by the telematics terminal 120. However, the present inventioncan release terminal switching by the mobile terminal 110 to solve theabove-mentioned disadvantage.

FIG. 6 is a view illustrating a network configuration of a terminalswitching service system according to another embodiment of the presentinvention. Here, an element having the same reference number performsthe same function, and its detailed description is omitted andhereinafter a different part is described.

In the case that after a mobile subscriber switches from the mobileterminal 110 to the telematics terminal 120 and uses the telematicsterminal 120, the mobile subscriber gets off the vehicle or the vehiclemoves away from a mobile communication service area (for example, thevehicle enters an underground parking lot), the telematics terminal 120is not provided with an incoming call. At this time, in the case thatthe mobile subscriber gets off the vehicle and goes somewhere elsewithout terminal switching release using the mobile terminal 110,although the mobile terminal 110 enters a service area, the mobileterminal 110 is not provided with an incoming call. A solution toprevent this case is required, which provides the mobile terminal 110with a call information message of a non-received call to inform themobile subscriber of the current terminal switching state.

Accordingly, as shown in FIG. 6, the terminal switching service systemaccording to the present invention further comprises a call informationproviding server 610 for writing and providing a call informationmessage including information of a non-received call.

At this time, in the case that the terminal-switched telematics terminal120 in use is in a non-receiving state, the home location register 160requests to the call information providing server 610 transmission of acall information message of a non-received call. And, the switchingcenter 140 intercepts a sending/receiving service of the mobile terminal110, but temporarily allows a call information message of a non-receivedcall, so that the call information message of a non-received call istransmitted to the mobile terminal 110. For this purpose, a relatedinformation is set in the home location register 160 so that the callinformation message of a non-received call can be transmitted to themobile terminal 110. And, the call information providing server 610transmits to the switching center 140 the call information message of anon-received call together with an indicator representing that thecorresponding message is a call information message of a non-receivedcall. Thus, the switching center 140 allows the mobile terminal 110 totransmit the call information message based on the indicator.

FIG. 7 is a flow chart illustrating a step for transmitting a callinformation message of a non-received call to a mobile terminal in thecase that a terminal-switched telematics terminal is in a non-receivingstate.

As shown in FIG. 7, in the case of a call destined for the telematicsterminal 120, the switching center 140 for the telematics terminal 120performs paging on the telematics terminal 120 to attempt to receive thecall (S701). At this time, in the case that the telematics terminal 120does not respond to the call, for example the telematics terminal 120moves away from a service area (S703), the switching center 140 for thetelematics terminal 120 requests transmission of a call informationmessage of a non-received call to the home location register 160 thatstores a profile information of the mobile terminal 110 (S705).

The home location register 160 that stores a profile information of themobile terminal 110 transmits to the call information providing server610 the call information message transmission request including acalling party information and a called party information (that is,information of the mobile terminal 110) (S707). Here, the home locationregister 160 should let a call information message of a non-receivedcall be transmitted to the telematics terminal 120 according to terminalswitching activation information of the mobile subscriber, but is presetso that a call information message of a non-received call is transmittedto the mobile terminal 110.

The call information providing server 610 receives the call informationmessage transmission request from the home location register 160,synthesizes the calling party information and the called partyinformation included in the call information message transmissionrequest, and writes a call information message of a non-received call.And, the call information providing server 610 transmits the writtencall information message to the switching center 140, where the mobileterminal 110 is located, through a message center (S709). At this time,the call information message includes an indicator representing that thecorresponding message is a call information message of a non-receivedcall.

The switching center 140, where the mobile terminal 110 is located,temporarily allows the mobile terminal 110 to receive the correspondingcall information message according to indicator included in the callinformation message (S711), and transmits the call information messageto the mobile terminal 110 (S713). Accordingly, the mobile subscriberset terminal switching from the mobile terminal 110 to the telematicsterminal 120, but receives the call information message of anon-received call by the mobile terminal 110, and thus the mobilesubscriber is informed that terminal switching is not released currentlyand can check an incoming call even in a non-receiving state of thetelematics terminal 120. The mobile subscriber releases terminalswitching using the mobile terminal 110, and can receive a mobilecommunication service by the mobile terminal 110.

In the above-mentioned embodiment, the telematics terminal 120 transmitsa terminal switching setting request/terminal switching release requestthrough a circuit switching network, and then the terminal switchingsetting signal/the terminal switching release request signal istransmitted to the switching center 140. And, a mobile terminalactivation or inactivation information is set in the switching center140, and the switching center 140 allows or intercepts a circuitswitching signal destined for the mobile terminal 110. And, a profileinformation of the mobile terminal 110 is stored in the switching center140 as a profile information of the telematics terminal 120, and thusthe switching center 140 transmits to the telematics terminal 120 acircuit switching signal to be transmitted to the mobile terminal 110.However, the present invention is not limited in this regard, and thepresent invention may be applied to a packet switching signal in thesame way. That is, the telematics terminal 120 may set or releaseterminal switching through a packet switching network. In this case, aterminal switching setting signal/terminal switching release requestsignal is transmitted to SGSN (Serving GPRS Support Node) that providesa packet service, consequently to the terminal switching server 170, andin the same way as the switching center 140, a mobile terminalactivation/inactivation information may be set in the SGSN and a profileinformation of the telematics terminal 120 may be set in the SGSN. Thus,a packet service provided to the mobile terminal 110 is intercepted orallowed, and the packet service provided to the mobile terminal 110 isprovided to the telematics terminal 120.

The above-mentioned method according to the present invention may beincorporated as a computer readable code in a computer readable medium.The computer readable medium includes all kinds of storage devices forstoring data readable by a computer system. For example, the computerreadable medium is CD-ROM (Compact Disc Read Only Memory), RAM (RandomAccess Memory), ROM (Read Only Memory), a floppy disc, a hard disc or amagneto-optical disc. The above-mentioned process is well known toordinary persons skilled in the art, and its detailed description isomitted.

As such, it should be understood that the detailed description andspecific examples, while indicating preferred embodiments of theinvention, are given by way of illustration only, since various changesand modifications within the spirit and scope of the invention willbecome apparent to those skilled in the art from this detaileddescription.

INDUSTRIAL APPLICABILITY

According to the present invention, when a mobile subscriber gets in avehicle, the mobile subscriber switches from a mobile terminal to atelematics terminal and uses the terminal-switched telematics terminal,and thus a car accident can be prevented. And, in the case of terminalswitching to a telematics terminal, the mobile subscriber can releaseterminal switching by the mobile terminal as well as by the telematicsterminal, so that the mobile subscriber can easily use a terminalswitching service. Further, in the case that the telematics terminalmoves away from a service area, a call information message of anon-received call is provided to the mobile terminal, and thus themobile subscriber can release terminal switching immediately and check acall received before terminal switching, so that the mobile subscribercan not miss an important call.

The invention claimed is:
 1. A method for providing a call informationmessage of a non-received call in a terminal transfer service, whichprovides a call information message of a non-received call in a terminalswitching state from a mobile terminal to a telematics terminal in amobile communication system, the method comprising: (a) processing acall destined for the mobile terminal by the telematics terminal; (b) inthe case that the telematics terminal is in a non-receiving state,writing a call information message of a non-received call; and (c)temporarily allowing the mobile terminal to receive the written callinformation message and transmitting the written call informationmessage to the mobile terminal.
 2. The method for providing a callinformation message of a non-received call in a terminal transferservice according to claim 1, wherein the step (b) inserts an indicatorinto the call information message, where the indicator represents that acorresponding message is a call information message of a non-receivedcall, and wherein the step (c) temporarily allows the mobile terminal toreceive the call information message based on the indicator.
 3. Themethod for providing a call information message of a non-received callin a terminal transfer service according to claim 1, wherein the step(b) includes: a switching center for the telematics terminal requestingcall information message transmission to a home location registerstoring a profile of the mobile terminal; the home location registerrequesting call information message transmission to a call informationproviding server; and the call information providing server writing acall information message.
 4. A system for providing a call informationmessage of a non-received call in a terminal transfer service, whichprovides a call information message of a non-received call in a terminalswitching state from a mobile terminal to a telematics terminal, thesystem comprising: a first switching center serving as a switchingcenter for the telematics terminal and configured to process a calldestined for the mobile terminal by the telematics terminal; a homelocation register for storing a profile information of the mobileterminal, and in the case that the telematics terminal is in anon-receiving state, receiving from the first switching center a requestfor transmission of a call information message of a non-received call; acall information providing device for writing a call information messageof a non-received call and transmitting the call information message viaa message center according to the request of the home location register;and a second switching center serving as a switching center for themobile terminal and configured to receive the call information message,temporarily allowing the mobile terminal to receive the received callinformation message, and transmitting the call information message tothe mobile terminal.
 5. The system for providing a call informationmessage of a non-received all in a terminal transfer service accordingto claim 4, wherein the second switching center intercepts a mobilecommunication service of the mobile terminal except the call informationmessage of a non-received call.
 6. The system for providing a callinformation message of a non-received call in a terminal transferservice according to claim 4, wherein the home location register routesto the first switching center an incoming call of the mobile terminalexcept the call information message of a non-received call.
 7. Themethod for providing a call information message of a non-received callin a terminal transfer service according to claim 2, wherein the step(b) includes: a switching center for the telematics terminal requestingcall information message transmission to a home location registerstoring a profile of the mobile terminal; the home location registerrequesting call information message transmission to a call informationproviding server; and the call information providing server writing acall information message.
 8. The system for providing a call informationmessage of a non-received call in a terminal transfer service accordingto claim 5, wherein the home location register routes to the firstswitching center an incoming call of the mobile terminal except the callinformation message of a non-received call.